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dc.contributor.authorCMS Collaboration
dc.contributor.authorKarapınar, Güler
dc.date.accessioned2018-01-17T08:29:13Z
dc.date.available2018-01-17T08:29:13Z
dc.date.issued2017-09
dc.identifier.citationKhachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer,T., Brandstetter, J.,...CMS Collaboration (2017). Coherent J/ψ photoproduction in ultra-peripheral PbPb collisions at sNN=2.76TeV with the CMS experiment, Physics Letters, Section B, 772, 489-511. doi:10.1016/j.physletb.2017.07.001en_US
dc.identifier.issn0370-2693
dc.identifier.urihttp://doi.org/10.1016/j.physletb.2017.07.001
dc.identifier.urihttp://hdl.handle.net/11147/6702
dc.description.abstractThe cross section for coherent J/ψ photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at sNN=2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159μb−1, collected during the 2011 PbPb run. The J/ψ mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is dσXn0n coh/dy(J/ψ)=0.36±0.04(stat)±0.04(syst) mb in the rapidity interval 1.8<|y|<2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0n measurement gives a total coherent photoproduction cross section of dσcoh/dy(J/ψ)=1.82±0.22(stat)±0.20(syst)±0.19(theo) mb. The data strongly disfavor the impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent J/ψ photoproduction in γ+Pb interactions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing.en_US
dc.description.sponsorshipThe Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authorityen_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.isversionof10.1016/j.physletb.2017.07.001en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectLarge Hadron Collider (LHC)en_US
dc.subjectCompact Muon Solenoiden_US
dc.subjectCMS experimenten_US
dc.titleCoherent J/ψ photoproduction in ultra-peripheral PbPb collisions at sNN=2.76TeV with the CMS experimenten_US
dc.typearticleen_US
dc.contributor.iztechauthorKarapınar, Güler
dc.relation.journalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsen_US
dc.contributor.departmentİYTE, Fen Fakültesi, Matematik Bölümüen_US
dc.identifier.volume772en_US
dc.identifier.startpage489en_US
dc.identifier.endpage511en_US
dc.identifier.wosWOS:000411369700071
dc.identifier.scopusSCOPUS:2-s2.0-85030700462


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